var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');

var connect = require("./tool/conn");

var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');
var pageRouter = require('./routes/page');
var goodsRouter = require('./routes/goods');
var gradeRouter = require('./routes/grade');

var app = express();

connect("project");

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));


// 允许访问api的时候cors跨域  (允许其他网站(前端),向当前服务器发送请求)
app.use((req, res, next) => {
  // 增加了cors跨域的请求头
  // res.header("Access-Control-Allow-Origin", "*");  // 允许其他网站(前端)
  res.header("Access-Control-Allow-Origin", "*");  // 允许其他网站(前端)
  res.header("Access-Control-Allow-Headers", "Content-Type,Content-Length, Authorization, Accept,X-Requested-With");
  res.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS");
  next();
})


app.use('/', pageRouter);
app.use('/', indexRouter);
app.use('/users', usersRouter);
app.use('/goods', goodsRouter);
app.use('/grade', gradeRouter);

// catch 404 and forward to error handler
app.use(function (req, res, next) {
  next(createError(404));
});

// error handler
app.use(function (err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;
